PN7220BP2 Usage problem

[ChumingYang]

At present, I have obtained the board of PN7220BP2. According to the PN7220 Bring-up on i.MX mini-. pdf written by kelly, the method of using BP2 seems to be still being written. Currently, I cannot communicate with the evaluation board of 7220BP2 using the IMX8MINI development board. The attachment is the logcat log that is started according to the 7220 quick start guide

At present, IMX8mini burns the firmware of the single-host in the official website. By modifying the host_sel on the board to simulate the use of single-host to the ground, the connection to the port on the J27 or J43 seat can not establish communication. Meanwhile, we have checked the information of the IMX8mini board. VDDIO should be 3.3V. Then we modified VDDIO_SEL on the 7220BP2 board to 3.3V, but communication still cannot be established

As described in PN7220 Bring-up on i.MX mini-. pdf, there should be a script（.bat file） after the PC is connected to the board through ADB, but it is not found. I am not sure whether it is relevant

In general, I would like to be able to build on what I have at hand: IMX8mini, 7220BP2, and single-host firmware have established a complete link test (the dual-host version chip of 7220/C101 is also used as a single host in the actual application scenario). Is there any idea that I can test, thank you very much

[ChumingYang]

The PN7220BP2 board has been powered separately, and the wiring has been checked several times according to the quick start guide. At present, there is no other way to make them communicate successfully

[KaiLi]

Hello @ChumingYang 

I would say the Image on the product page does not support BP2 version. So, where did you get the Image file?

[ChumingYang]

I don't have the firmware of BP2, currently I only have the firmware of BP1, but theoretically modifying Host_sel can make 7220 work in singlehost mode, but I can't establish communication with 7220，I suspect that after connecting Host_sel to the ground, not using the IIC interface on the J43 terminal

[ChumingYang]

According to the pin description on page 13 in the Datasheet, 7220/C101 should operate in singlehost Mode when host_if_sel0 is low and the mode pin is also low. Is this correct

[KaiLi]

Hello @ChumingYang 

Since the platform you are debugging is based on NXP's development board, it is recommended to refer to AN14224, which should be helpful to you, please refer to it, and update us if you have any questions.

[ChumingYang · Accepted solution]

Hi Kelly

You can use the following cable connections to drive the BP2 evaluation board in the 8mini (single-host firmware)

        7220BP2                      ->  IMX8MINI

  (SDA)  ATX_A（J27-12） ->  J1003-3

（SCL）ATX_B（J27-14） ->  J1003-5

             VEN （J43-24）   ->  J1003-40

             IRQ  （J27-20）   ->  J1003-37

             Mode（J43-32）  ->  J1003-38

The IIC address cable is grounded

             ATX_C（J27-12） ->  J27-9  

             ATX_D（J27-14） ->  J27-10

The Host_sel jumper is grounded, and the IIC communication level is changed to 3.3V